Hi Bill Keith,
Welcome to Microsoft Q&A forum.
Please note that our forum is a public platform, and we will modify your question to hide your personal information in the description. Kindly ensure that you hide any personal or organizational information the next time you post an error or other details to protect personal data.
Seeing an unrecognized address during sign-in can be concerning. You can start by trying the steps suggested by Q&A Assist: review your list of aliases and set your preferred address as the primary one under Manage how you sign in (https://account.live.com/names/manage).
Additionally, please review your Security info (verification/recovery methods). If the “@hotmail” address appears as a destination for verification codes, remove it there and keep only the email/phone methods that you control.
Important: a “recovery email” is not always the same as the account’s primary alias. Your @live.co.uk address needs to be listed as an alias in order to be set as the primary sign-in name.
Please feel free to let me know if you have any further updates, thanks.
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